Well you can calculate the word count by using formulas but it might not be easy for everyone. Instead, please try this. Select everything in the excel file with select all options, copy it to Microsoft word. Microsoft should detect the word count automatically.
You can calculate the word count of excel file by importing the excel sheet to Microsoft word. For this: Open the excel file, save it in Save it in Unicode text format (*.txt) and Open it with Microsoft Word. Microsoft Word will calculate the word count automatically.
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